CVE-2021-47642
Nvidiafb Linux Kernel Buffer Overflow Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer.
INFO
Published Date :
Feb. 26, 2025, 6:37 a.m.
Last Modified :
Feb. 26, 2025, 6:37 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2021-47642.
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The following table lists the changes that have been made to the
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Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer. Added Reference https://git.kernel.org/stable/c/055cdd2e7b992921424d4daaa285ced787fb205f Added Reference https://git.kernel.org/stable/c/08dff482012758935c185532b1ad7d584785a86e Added Reference https://git.kernel.org/stable/c/37a1a2e6eeeb101285cd34e12e48a881524701aa Added Reference https://git.kernel.org/stable/c/41baa86b6c802cdc6ab8ff2d46c083c9be93de81 Added Reference https://git.kernel.org/stable/c/47e5533adf118afaf06d25a3e2aaaab89371b1c5 Added Reference https://git.kernel.org/stable/c/580e5d3815474b8349250c25c16416585a72c7fe Added Reference https://git.kernel.org/stable/c/6a5226e544ac043bb2d8dc1bfe8920d02282f7cd Added Reference https://git.kernel.org/stable/c/72dd5c46a152136712a55bf026a9aa8c1b12b60d Added Reference https://git.kernel.org/stable/c/9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47642 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47642
weaknesses.